Just got weighed Friday morning. I was fearful of being worse, but ended up being 20 pounds over on my truck's GVWR. I know for sure I had more than 20 pounds worth of tools in the bed as it was our...
Agree with Old-Biscuit, that 20#s over or 200#s over GVWR, no big deal, your rear axle has 600+ lbs left, so non-issue, when towing a FW. Also agree with FAWR seems wrong, being only 5,200 on a 13 diesel.
Where are you getting your axle ratings from? Are you looking at the door pillar on your truck? I'm thinking 6000 FAWR, and 7280 RAWR on a 13 350 4x4 SRW.